System control unit



FIG. 1 is a right top perspective view of a system control unit in accordance with the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dash-dash broken lines in the figures represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a system control unit, as shown and described. 